Molding-machine.



W. W. DOOLITTLE.

MOLDING MACHINE. APPLIGATIDN FILED MAR. Il,

Patented Aug'. 26. 1913.

4 SHEETS-SHEET 1.

WITNESSESI W. W. DOLITTLE.

MLDING MACHINE. APPLICATION FILED MAR.1], 1911. 1,071,402. Patented Aug. 26, 1913.

-1 SHEETS-SHEET 3,

W. W. DOLITTLE.

MOLDING MACHINE. APPLIGATwN FILED MAR.

1x. w11. Paynd Aug. 26, 1913.

4 SHEETS-*SHEET 4 UNI'FEDv STATES PAIENT OFFICE.

WILLIAM W. l:DOOL]I'1.".I .LE, OF CHICAGO, ILLINOIS, ASSIGNOR T0 CRANE COMTANY, UF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS. i

MOLDING-MACHINE.

Specification of Letters Patent.

Patented Aug. 26,1913.

Application filed Marca 11, 1911. serial No; 613,820.

'11g all @710117, i mayconcem.' l

Be it known that I, WILLIAM VJ. DooLl'r- Citn of the United States, residing at Chicago, in the county of`Cook, and in the State of Illinois,` have invented certain-new and useful Improvements in MoldingMa chines, of which the following is a specifica-` .'tion.

My invention has reference to molding` machines and particularly to roll-o ver mold ingmachines'gamd it has for its primary objects the provision of an improved roll-over v molding machine wherein the flask may be readily placed in position andthe mold,

when completed, easily removed; the pro.

roll-'over molding machine of simple con` struction which is quick and effective in operation, whereby the handling of the mold parts V1s greatly facilitated and the cost of production lessened'. These together with suchl other objects as may hereinafter appear, 'or are incidental to my invention, Vl

attain vby means of a construction illustrated in `preterred form in accompanyingl drawings, wherein- Figure 1 is a .partial side elevation `and ction of arnold/ing machine `embodyingmy' vention. Fig. 2 lsva partial plana-nd see tion of F ig. 1, the section being taken along the linenrief Fig. 1, Fig. e is afnam-a1 end elevation and section of Fig. 2, the 'section being'on thefcenter 'lineof Fig. 2, Figs.

* 4 ando areA vietv'mfgadetail of myinvenf tion'. Figlil is a pl view, and Fig." Tis a aside elevation, partially in section, of the mechanism for controlling theeadmis'sion of i fluid pressure tothe rappers.

One of h'e chief objectsof 'my invention is to provide a moldingmachine wherein the han-'tiling of the-flask and of themold, when ease and quickness of operation secured, thus lessening the cost of production.

To this end I have provided a base plate 1 on which are mounted bearing brackets 2 and 3 into which is trunnioned a framework 4 which supports the parts of the completed, is greatly facilitated, and greater molding machine proper. Referring toFig. u

l of the drawings it will be seen that the frame-Work 4 carries a main-cylinder5fin which is mounted a piston 6, carrying a' press plate 7 to whichis secured a rapper plate 8. The pattern plate of the machine and a frame 9 for the flask are supported on the rapper plate inthe usual manner, and a mold flask 1 0 is indicated iii/position over thepattern plate. Adjacentthe main cylin dervand bolted to the frame Workl are two i supplementary cylinders 11 and 12 in which are mounted pistons 13, the pistonstems 14 ofthe center line of the vmachine. 'The'. platen 19 is'adjustably carried by the usufal strain bar 2() which is provided at iats'fends with brackets .21 and 22, carrying thef's'etsY of \vheels 23 and 23 engagingthe tracks`17 c and 18.

" Referring particularly to Fig. 2'it will be lseen that the trunnioiis, or axes 24 andf2f1- of the machine have roller bearings 242 in the bearing brackets.' The machine 'can be inverted or turned either by handor byA means of the handle 25 and gears 26 and'27, @the latter` of which is secured to thetrun- -nion, 24. l

Ref rringfrlnoyvito the means or supplying pressure to operate the cylinders and the air rapperyitwill beseen Athat I have provided `a supply pipe 28 leading vto a source of air pressure. The supply 'is controlled by the valve 29, mounted on the bearing bracketh2. Leading from the `valve. 29 to the trunnibn 24 is apipe 30. The trunnion iS provided with a" passage 31 from whichvof which are secured to the ends of the press 15 and 16 to which are bolted Y the under side of the rapper plate 8 in the usual manner. Referring to Fig. 1 it will be seen that. the pipe 36 is provided with a valve 37 for eontrollingthe flow of the pressure' to the rapper, the operation of which will be hereinafter set forth.

The operation of the device is as follows: `Wlien it is desired toplace the flask 10 in position over the pattern plate and traine 9- tlie strain bar 20, which 'carriesthe platen 19 is retracted or rolled along'the tracks 17 and 18, thus giving free access to the inachine. l'Vhen the ask is in position the strain bar is rolled back until the platen centers in position over the flask. Airpres-A sure is then admitted to the main cylinder 5 which raises the piston 6, Dresses the flask 10 against the platen 19 in 'the usiial manner to pack the sand in the flask and forni the mold. During this pressing operation the pistons 13 are moved to the position indicated in dotted lines in Fig. 1. When the mold is completed the machine is inverted and the flask 10 is then carried by the platen 19. After the pattern has been rapped to tree it from the mold, pressure is admitted to the supplementary cylinders 11 and 412, through the branch pipe 85 controlled by the cock 35'.' This raises the pistons 13-and stems 111, thereby lifting the press plate, rapper plate, pattern plate and associated parts from the flask, it being understood that the pressure vin the cylinder 5 is exhausted to permit-of such operation. The platen and the flask now supported thereon are retracted or pushed btlck from the-machine Valong the tracks 1 and 18. This brings the flask free of the: machine in a position where it can bc readily removed by hand or in case large flasks' are employed by.

appropriate machinery.

In order to relieve -the sets of Wheels 23 and 23 from the strain lwhich ordinarilyA would be placed upon theml in the pressing operation, I have provided the lugs' 39 and 4f by means of tliestuds 41, the holes to receive the studs being of a diameter greater than the diameter of the studs, thus affordand the traine w'ork. But a relatively small area of bearing surface is provided between the plates and the frame work in order to reduce friction. The lugs 39 and 40 are pro- -vided with recesses 42 in which are mounted and 1G and norniall hold them in their tion the pressure exerted on the` platen is transmitted to the plates 15 and 16 through the springs until the shoes 44 at the ends of strain bar, platen and the weight of the flask and mold, when the machihe is inverted or rolled over, until the strain bar is clear of the lugs 39 and 40, when it will be obvious along the tracks. The movement ot the strain bar away from the center of the ma" bolted to the lugs 39 and 40. The axial movement of the machine is limited One the position indicated in 3; 'Wfhen the 48, (see Fig.' l).

ling the flow o'prcssureA to the air rapper, it will be seen on inspection of Figfl, that the pressure to the cylinder '5 the valve is opened the valve stein 51 and open vthe valve. The

a rod 52 mounted in the cylinder 121i I 1Vlhen this occurs the spring'50 is -compressed and when the piston 6 and' been returned to position.

The structure is simple, .and-Tco mp'act, is

rapidity. By my im'proved-icrohstituction both placing the-flaskin'fposition'-lnd removing thel completedv mold,` nd:this' feature pletedl mold 'to afiriininiiin, and also increases ing a slight vertical play between the plates lowest position.'l During the pressing opera-- the strain bar abut the lugs 39 and 40. This relieves the? wheels and tracks of any undue stress. Thefsprings are of sufficient strengthl to normally raise the plates A'15 and 16, the' chine is limited by the ends of the tracks 1'( and 18, and the movement iii the other direction is limited by. the plates 45, which are valve is normally closed when the piston 6 and press plate 7 are in the lowest position. l'Vhen the piston 6 is raised on admission of L 'Y '110 by means of a lever 49 and spring -50 whichv4 -I norinallypresses the lever downto engagevalve 'remains open until the lever-49 abuts the valve 37 permitted to close. v ;Thisoceurs pressplate( have free access to the machine fis"afl`or1dffon 1 12o springs 43 which take against the plates 15 the strainl bar and wheels, and compresses that the strain bar can be readily rolled Referring now tothe valve 37' f (iiri'contiolalways maintainedin proper balanced posi-' 'v ltion, and can be operated with ease v'fand v`reduces-fthe.liability?o'fdarnagei'to the commeeepueayoeanathalie-sentada@fait molding operation. Any uirduef flstressr ont the vinirfiti""e'iiieelianisni*of thie'lplaten is obviated'an the various parts of ther/machine are readily accessibleand yeasily reinovedor replaced in case of breakage. Otherlzidvantages willA occur to those skilled in the art.

n.-Ha'vimg; thus described my invention and illustrated its use what I claim is newand desire to secure by Letters Patent is the following 'i v 1. A roll-over molding-machine comprising in combination, a support, a frame work trunnioned in the support, a piston mounted in the frame work and adapted to supporti a mold flask', a platen, a supporting carriage therefor mounted in the frame Work and means whereby the carriage may be retracted.

2. A roll-over molding machine comprising in combination, a support, a frame work trunnioned in the support, a piston mounted in the frame Work and adapted to supporta mold flask, a. platen, a supporting'carriage therefor mounted in the frame work, mea-ns whereby the carriage may be retracted, and means for limiting the movement of theV carriage.

3. A roll-over molding machine comprising in combination, a support, a frame-Work trunnioned in the support, a piston mounted in the frame-work adapted to;4I support fa mold flask, and a platen slidably supported on the .frame-work for relative movement 'with respect thereto.

. 4. A` roll-over molding machine comprisling'in combinationia support, aframe Work trunnioned in'the support, a piston carried by the frame work and adapted to support a mold flask, a.` platen, afpar of tracks mounted on the fram/egwcrk, and a carriage for the platen mounted onihe tracks.

A roll-over molding machine comprising in vconibinatimyn/support, a frame work trunnioned in the support, a piston carried by the frame work/ and adapted to support a mold tlask,' a Apla/ten', 'a pair of tracks mounted on the frame Work, asupport frame for the platen, and wheels on the supporting-frame orthe platenadapted to engage the tracks. i

6. A roll-over molding machine comprising 1n combination, a support, a vframe workf trunnioned in the support, a. piston carried by the frame Work and adapted to support;v a vmold flask, a plat-en, a. pair of tracks mounted on the frame work, a supporting frame for the platen, Wheels on the supporting frame `i'or the platen adapted to engage the tracks, and means whereby the wheels and tracks are relieved-of pressure when the flask is raised against the platen.

7. A roll-over molding machine comprising' in-,combinatioma support;,a frame gwprl,

yieldingly mounted Ain the rame'wo'rk, aj f .Carria ge for the platen provided with Wheels.

the frame Work against which the platen V7o to engage the tracks, and a lug mounted on carriage is adapted to abut `when the flask.

is raised against the platen. Y

8. A roll-over molding machine comprising in combination, a. support, a frame Workv trunnioned in the support, a piston carried by the frame Work and adapted to support a flask, plates yieldingly mounted on the frame Work, tracks mounted on plates, a platen, a supporting carriage therefor 'provided with wheels to engage the tracks, and lugs mounted on the frame Work against which the supporting carriage of the platen is adapted to abut when the flask is raised against the platen. l

9. A molding machine comprising in combination, a supporting frame work, a piston mounted thereon adapted to support a mold tlask, a platen, a! carriage therefor yieldingly mounted inthe supporting frame work and means for limiting the movement of the carriage.

10. A roll-over molding machine comprising in combination, a support, a frame-Work trunnioned in the support, a platen mounted on the frame-work, a support for a flask and pattern, fluid-actuated ramming means mounted in theiframe-Work for advancing4 the support to the platen, and fluid-actuated means connected to said vsupport for elevat- -ing said support and drawing the pattern,

cylinder provided with a piston connected l to said plate, means for admitting fluid pressure into the main cylinder to advance the ramming piston, and means for admittin cylinder to elevate the said plate and draw the pattern after the machine has been inverted.

12. A roll-over molding machine comprisfluid pressure into the supplementary.`

ing in combination a support, a frame-Work trunnioned in the support, a platenmounted on-the frame-Work, a mtain cylinder mounted on the frame-Work provided with a ramming piston, a plate mounted on said piston adapted to support a mold flask andpattern,

supplementary cylinders adjacent 'the main ,A

cylinder provided with pistons connected to- In testimony whereof, I hve hereunto set the'plate, means for admitting Huid pressure my hand in the presence of the two subinto the main cylinder to advance the ramscribing witnesses. A y ming piston, and means for admitting fluid WILLIAM W. DOOLITTLE. pressure into the supplementary cylinders Witnesses: I

to elevate the said vplete and draw the pat- F. E. MCCREARY,

tern after the machlne has been inverted. l HARRY MCCREARY. 

